Tender For supply of set of 2 sizes of nitrile rubber for 2 ton air conditioner piping tube foam heat and cold insulation polyethylene foam pipe class 1 black.1) 3/8 inch inner dia , 9mm thickness, 1.8 mts length 1500 nos2) 5/8 inch inner dia , 9mm thickness, 1.8 mts length 1500 nos